Synthesis of porous hollow six-branched star-like MnO and its enhanced electrochemical properties as a lithium ion anode material

• Published in: Ceramics international Vol. 46; no. 13; pp. 20878 - 20884
• Main Authors: Qi, Jie, Zhu, You-yu, Zhang, Ji-zong, Jiao, Miao-lun, Wang, Cheng-yang
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-09-2020
• Subjects: Anode material; Lithium ion batteries; Manganese oxides; Micro-nanostructure; Anode material; Lithium ion batteries; Manganese oxides; Micro-nanostructure
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2020.05.136

Novel structured porous hollow six-branched star-like MnO was synthesized via a facile, surfactant-free hydrothermal decomposition, which was followed by high-temperature heat treatment. Compared with the nonporous hollow six-branched star-like MnO2, the porous hollow six-branched star-like MnO realized substantially higher electrochemical performance (844.8 mAh g−1 at 0.5 A g−1 after 200 cycles and 769.7, 741.7, 728.9, 713.2, and 704.4 mAh g−1 at 0.1, 0.3, 0.5, 1, and 1.5 A g−1, respectively, for porous star-like MnO, compared with 338.4 mAh g−1 and 476.7, 392.4, 357, 303.4, and 269.9, respectively, under the same testing conditions for nonporous star-like MnO2). The superior performance of the porous hollow six-branched star-like MnO is attributed to its enhanced electrode kinetics, which are due to an enlarged active contact area and shortened electron and Li+ conduction paths.